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| <StructureSection load='1mfq' size='340' side='right'caption='[[1mfq]], [[Resolution|resolution]] 3.10Å' scene=''> | | <StructureSection load='1mfq' size='340' side='right'caption='[[1mfq]], [[Resolution|resolution]] 3.10Å' scene=''> |
| == Structural highlights == | | == Structural highlights == |
| <table><tr><td colspan='2'>[[1mfq]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MFQ OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1MFQ FirstGlance]. <br> | | <table><tr><td colspan='2'>[[1mfq]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MFQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MFQ FirstGlance]. <br> |
| </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.1Å</td></tr> |
| <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=CCC:CYTIDINE-5-PHOSPHATE-2,3-CYCLIC+PHOSPHATE'>CCC</scene></td></tr> | | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CCC:CYTIDINE-5-PHOSPHATE-2,3-CYCLIC+PHOSPHATE'>CCC</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> |
| <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SRP19 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), SRP54 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1mfq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mfq OCA], [https://pdbe.org/1mfq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mfq RCSB], [https://www.ebi.ac.uk/pdbsum/1mfq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mfq ProSAT]</span></td></tr> |
| <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1mfq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mfq OCA], [http://pdbe.org/1mfq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1mfq RCSB], [http://www.ebi.ac.uk/pdbsum/1mfq PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1mfq ProSAT]</span></td></tr> | |
| </table> | | </table> |
| == Function == | | == Function == |
| [[http://www.uniprot.org/uniprot/SRP54_HUMAN SRP54_HUMAN]] Binds to the signal sequence of presecretory protein when they emerge from the ribosomes and transfers them to TRAM (translocating chain-associating membrane protein). [[http://www.uniprot.org/uniprot/SRP19_HUMAN SRP19_HUMAN]] Signal-recognition-particle assembly, binds directly to 7S RNA and mediates binding of the 54 kDa subunit of the SRP. | | [https://www.uniprot.org/uniprot/SRP19_HUMAN SRP19_HUMAN] Signal-recognition-particle assembly, binds directly to 7S RNA and mediates binding of the 54 kDa subunit of the SRP. |
| == Evolutionary Conservation == | | == Evolutionary Conservation == |
| [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1mfq ConSurf]. | | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1mfq ConSurf]. |
| <div style="clear:both"></div> | | <div style="clear:both"></div> |
| <div style="background-color:#fffaf0;">
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| == Publication Abstract from PubMed ==
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| The eukaryotic signal recognition particle (SRP) is a cytoplasmic ribonucleoprotein particle that targets secretory and membrane proteins to the endoplasmic reticulum. The binding of SRP54 to the S domain of 7SL RNA is highly dependent on SRP19. Here we present the crystal structure of a human SRP ternary complex consisting of SRP19, the M domain of SRP54 and the S domain of 7SL RNA. Upon binding of the M domain of SRP54 to the 7SL RNA-SRP19 complex, the asymmetric loop of helix 8 in 7SL RNA collapses. The bases of the four nucleotides in the long strand of the asymmetric loop continuously stack and interact with the M domain, whereas the two adenines in the short strand flip out and form two A-minor motifs with helix 6. This stabilizing interaction is only possible when helix 6 has been positioned parallel to helix 8 by the prior binding of SRP19 to the tetraloops of helices 6 and 8. Hence, the crystal structure of the ternary complex suggests why SRP19 is necessary for the stable binding of SRP54 to the S domain RNA.
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| Induced structural changes of 7SL RNA during the assembly of human signal recognition particle.,Kuglstatter A, Oubridge C, Nagai K Nat Struct Biol. 2002 Oct;9(10):740-4. PMID:12244299<ref>PMID:12244299</ref>
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| From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| </div>
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| <div class="pdbe-citations 1mfq" style="background-color:#fffaf0;"></div>
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| ==See Also== | | ==See Also== |
| *[[Signal recognition particle protein|Signal recognition particle protein]] | | *[[Signal recognition particle 3D structures|Signal recognition particle 3D structures]] |
| == References ==
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| <references/>
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| __TOC__ | | __TOC__ |
| </StructureSection> | | </StructureSection> |
| [[Category: Human]] | | [[Category: Homo sapiens]] |
| [[Category: Large Structures]] | | [[Category: Large Structures]] |
| [[Category: Kuglstatter, A]] | | [[Category: Kuglstatter A]] |
| [[Category: Nagai, K]] | | [[Category: Nagai K]] |
| [[Category: Oubridge, C]] | | [[Category: Oubridge C]] |
| [[Category: 3-helix junction]]
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| [[Category: A-minor motif]]
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| [[Category: Rna-protein complex]]
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| [[Category: Signaling protein-rna complex]]
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